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placoid 音標拼音: [pl'ækɔɪd] a. 盾鱗狀的
n. 有盾鱗的魚 盾鱗狀的有盾鱗的魚 placoid adj 1: as the hard flattened scales of e.g. sharks [synonym: {placoid}, {platelike}] Placoid \Plac"oid\, a. [Gr. pla`x, plako`s, a tablet -oid.]
(Zool.) Platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoids. [1913 Webster] Placoid \Plac"oid\, n. (Zool.) (a) Any fish having placoid scales, as the sharks. (b) One of the Placoides. [1913 Webster]
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